文献类型：期刊文献

英文题名：Effects of Microwave-Assisted Liquid Hot Water Pretreatment on Chemical Composition and Structure of Moso Bamboo

作者：Cui, Jie-Yu[1] Zhang, Ning[2,3,4,5,6] Jiang, Jian-Chun[2,3,4,5,6]

第一作者：Cui, Jie-Yu

机构：[1] College of Chemical Engineering, Nanjing Forestry University, Nanjing, China; [2] Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, China; [3] National Engineering Laboratory for Biomass Chemical Utilization, Nanjing, China; [4] Key Laboratory of Chemical Engineering of Forest Products, National Forestry and Grassland Administration, Nanjing, China; [5] Key Laboratory of Biomass Energy and Material, Nanjing, China; [6] Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing, China

年份：2021

卷号：9

外文期刊名：Frontiers in Bioengineering and Biotechnology

收录：EI(收录号：20220911705241)

语种：英文

外文关键词：Bamboo - Degradation - Enzymatic hydrolysis - Fourier transform infrared spectroscopy - Lignin - Liquids - Water

摘要：The effects of microwave assisted liquid hot water (MA-LHW) pretreatment on the chemical composition of Moso bamboo were investigated, and the fiber structure of pretreated residues were studied. The results showed that MA-LHW pretreatment had high selectivity for the degradation of hemicellulose in Moso bamboo, and the extracted hemicellulose could be used to prepare xylooligosaccharide through enzyme depolymerization. The degradation rates of cellulose and lignin after MA-LHW pretreatment were only 14.73% and 7.18%, which were significantly lower than those of LHW pretreatment; 155.0mg/g xylobiose and 61.0mg/g xylotrisoe can be obtained after enzymatic hydrolysis, and the yield of xylo-oligosaccharide reached 80.59% of the theoretical conversion rate. MA-LHW pretreatment increased the removal of hemicellulose, lignin, and other non-crystalline parts in bamboo materials, and more cellulose with crystalline structure was retained, which increased the CrI value of Moso bamboo by 14.84%. FTIR spectra showed that the characteristic peak intensity of hemicellulose was significantly reduced after MA-LHW pretreatment, which confirmed the selective degradation of hemicellulose by MA-LAW pretreatment. Moreover, MA-LHW pretreatment also destroyed O-H, C-H, C-O-C, and β-glucoside bonds in Moso bamboo fiber, caused by the recombination and synthesis of some groups (-CH2 and C=O) of cellulose, hemicellulose, and lignin destroyed under pretreatment conditions. Copyright ? 2022 Cui, Zhang and Jiang.